Preferred setup for me is a fixed on-board plotter (mid range) and a mobile tablet for waypoint/route planning. The plotter is further communicating (NMEA 2K) with the various sensors and on-deck tactical display.
My lithmus test for the planning app is the ability enter a set of race courses (aka routes) as a different combination of the same set of waypoints. I need to be able to do this BOTH GRAPHICALLY FROM THE CHART AND BY USING A PICK LIST OF WAYPOINTS ... then import/export GPX file to/from the plotter. All this is done prior to race day.
The GPX data is loaded on race day or shortly before. Sh.t happens fast during a start sequence, and I prefer the crew not have their heads buried in the electronics. We activate the pre-entered route and then concentrate on sailing fast.
I'm IPad based. Blue Chart Mobile was highly frustrating (I'm being kind), and Garmin did not act on the feedback I provided. I'm currently using iSailGPS. Waypoint and route management is good, but GPX import/export needs some work.
I am curious to try some of the ideas you all have offered.
@TakeFive. OpenCPN running on a Lenovo Mix2, correct? Looks like it has an SD card slot. Good.
@Alex W. Navionics running on a nexus 7 V1 (not a V2). Seems no SD card there?
So much to try, so little time and $$$
The Android and iThingy space has indeed influenced the marine electronics space. But as a former product designer, IMO these devices will be supplements, not primaries. Consumer grade gear simply will not meet the requirements for rain, spray, washdown, sunlight view-ability, heat, or even below decks humidity.